WO2012024952A1 - {0> procédé et système de commutation de chemin sur la base d'un service point à multipoint <}0{><0} - Google Patents

{0> procédé et système de commutation de chemin sur la base d'un service point à multipoint <}0{><0} Download PDF

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Publication number
WO2012024952A1
WO2012024952A1 PCT/CN2011/074603 CN2011074603W WO2012024952A1 WO 2012024952 A1 WO2012024952 A1 WO 2012024952A1 CN 2011074603 W CN2011074603 W CN 2011074603W WO 2012024952 A1 WO2012024952 A1 WO 2012024952A1
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WIPO (PCT)
Prior art keywords
path
access device
forwarding
server
leaf
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PCT/CN2011/074603
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English (en)
Chinese (zh)
Inventor
杨学成
张利锋
王春霞
汪正海
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中兴通讯股份有限公司
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Publication of WO2012024952A1 publication Critical patent/WO2012024952A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
    • H04L41/0659—Management of faults, events, alarms or notifications using network fault recovery by isolating or reconfiguring faulty entities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
    • H04L41/0663—Performing the actions predefined by failover planning, e.g. switching to standby network elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/22—Alternate routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/68—Pseudowire emulation, e.g. IETF WG PWE3
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/16—Multipoint routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/28—Routing or path finding of packets in data switching networks using route fault recovery

Definitions

  • the present invention relates to a fault notification technology for a communication network, and more particularly to a path switching method and system based on point-to-multipoint service. Background technique
  • Layer 2 Virtual Private Network is a technology that relies on Internet service providers and network service providers to establish a dedicated data communication network in a public network. It can be divided into virtual private LAN services (VPLS, Virtual Private LAN). Service) and Virtual Private Wire Service (VPWS), the former is based on Ethernet service forwarding and supports point-to-multipoint network deployment; the latter is virtual private line service, which only supports point-to-point network deployment.
  • VPLS Virtual Private LAN services
  • VPWS Virtual Private Wire Service
  • the PW OAM Message Mapping technology in the IETF standard document "draft-ietf-pwe3-oam-msg-map-12" is a pseudowire fault notification technology that supports access paths (AC) and point-to-point emulation services.
  • Fault map of pseudowire (PW) that is, operation, management & maintenance (OAM) of AC when fault occurs in AC
  • the link is advertised to the remote end by the PWE3 (Pseudo-Wire Emulation Edge to Edge) protocol packet, and the remote end can quickly learn that the service path has failed for subsequent processing.
  • PW redundancy in the IETF standard document "draft-ietf-pwe3-redundancy-01" is a pseudowire redundancy protection technique.
  • network backup should consider implementing a path backup mechanism. When the primary path fails, user traffic is quickly switched to the backup path to minimize traffic loss. Main path, backup The path relationship can be generated through protocol signaling negotiation or by user-specified designation.
  • the PW OAM message mapping technology and the PW redundancy technology are interrelated.
  • the former is mainly responsible for fault notification.
  • the latter is mainly responsible for responding to the fault information that is advertised, determining the current effective path, and guiding traffic forwarding.
  • the two complement each other and jointly complete the fast convergence of the fault. .
  • the PW OAM Message Mapping technology and the PW redundancy technology are mainly for the point-to-point simulation service scenario.
  • FIG. 1 when the path on the access side is faulty, the fault can be transmitted to the remote device, providing a strong Fault detection or fault notification capability; but in point-to-multipoint services, such as point-to-multipoint ETREE services, as shown in Figure 2, this technology cannot be supported.
  • point-to-multipoint services such as point-to-multipoint ETREE services, as shown in Figure 2
  • the root node (root PE) device access side path fails. The fault cannot be transmitted to the leaf node (PE1/PE2/PE3) device to perform traffic switching again, which reduces the fault convergence capability and network stability. Summary of the invention
  • the main object of the present invention is to provide a path switching method and system based on point-to-multipoint service, which improves fault convergence capability in point-to-multipoint service and ensures network stability.
  • a path switching method based on a point-to-multipoint service includes: when a path of an access side between a server and a primary access device fails, the primary access device advertises the path of the access side to the server The fault occurs and all the leaf access devices are notified that the pseudowire connection path is faulty; the server switches the server-to-client traffic to the backup forwarding path for forwarding through the backup access device; the leaf access device or the client reselects the effective forwarding path. , Switch the client-to-server traffic to the backup forwarding path for forwarding.
  • the method further includes: establishing a point-to-multipoint service pseudowire connection between the primary access device and the leaf access device, and the backup access device and the leaf access device respectively; Operation, management & maintenance (OAM) detection deployment of the access side path between the server and the primary access device, and the server and the backup access device; respectively, the primary access device and the leaf access device, and the backup connection
  • OAM Operation, management & maintenance
  • the leaf access device or the client switches the client-to-server traffic to the backup forwarding path for forwarding, including:
  • the leaf access device If the leaf access device is configured with the PW path backup policy, the leaf access device recalculates the effective forwarding path through the pre-configured pseudowire PW path backup policy, and switches the client-to-server traffic to the backup forwarding path for forwarding.
  • the leaf access device If the leaf access device does not have a pseudowire PW path backup policy, but the leaf access device and the client support OAM detection, the leaf access device notifies the client of the pseudowire connection path failure through the OAM packet. Select the backup forwarding path or stop the traffic;
  • the leaf access device does not have a pseudowire PW path backup policy configured, and the first access Ethernet (EFM) or connection fault management (CFM) link detection protocol is not supported between the leaf access device and the client, the leaf access is performed.
  • the device converts the pseudowire connection path fault into a port fault. After the client knows that the port is faulty, it reselects the backup forwarding path or stops the traffic.
  • the method further includes: the primary access device notifying the server of the access side path failure recovery and notifying all the leaf access devices of the pseudowire connection path failure. Recovery; server-to-client traffic through the primary access device Switch back to the primary forwarding path for forwarding; the leaf access device or client reselects the effective forwarding path, and switches the client-to-server traffic back to the primary forwarding path for forwarding.
  • a path switching system based on a point-to-multipoint service comprising: a primary access device, a server, one or more leaf access devices, and a client corresponding to the leaf access device;
  • the primary access device is configured to notify the server that the access side path fails when the access side path between the server and the primary access device fails, and notify all leaf access devices under the point-to-multipoint service The pseudowire connection path has failed;
  • the server is configured to switch the server-to-client traffic to the backup forwarding path for forwarding after the access path fails.
  • the leaf access device or client is used to reselect the effective forwarding path and switch the client-to-server traffic to the backup forwarding path for forwarding.
  • the primary access device includes: an AC side OAM detection module, a service management module, a PW side OAM detection module, and a service forwarding module;
  • the AC side OAM detection module is configured to detect an access side path fault, and implement OAM ⁇ ⁇ text transmission and reception with the server through a protocol;
  • the protocol is an EFM or CFM link detection protocol;
  • a service management module used for a maintenance point Corresponding relationship between the access side path and the pseudowire connection path to the multipoint service;
  • the PW side OAM detection module is configured to detect a fault of a pseudowire connection path, and implement OAM packet transmission and reception between all leaf access devices in a point-to-multipoint service through a protocol; the protocol is a transport multi-protocol label switching (TMPLS) OAM) or bidirectional forwarding detection (BFD) link detection protocol; a service forwarding module, which is used to maintain forwarding path information and provide a forwarding path for traffic forwarding.
  • the service management module further includes: a virtual AC management module and a virtual PW management module; wherein, the virtual AC management module is configured to maintain an access side path state under the point-to-multipoint service; and includes one or more AC management modules.
  • Each of the AC management modules is configured to maintain the path status of each access side; when the virtual AC management module considers that the access side path of the point-to-multipoint service fails, Notify this fault to all PW management modules in the service;
  • the virtual PW management module is configured to maintain a pseudowire connection path state under the point-to-multipoint service; and includes one or more PW management modules, where each PW management module is used to maintain the status of each pseudowire connection path.
  • the leaf access device includes a PW path backup module, configured to configure a pseudowire PW path backup policy, and provide a backup forwarding path for forwarding traffic.
  • the leaf access device or the client switches the client-to-server traffic to the backup forwarding path for forwarding, including:
  • the leaf access device If the leaf access device is configured with the PW path backup policy, the leaf access device recalculates the effective forwarding path through the pre-configured pseudowire PW path backup policy, and switches the client-to-server traffic to the backup forwarding path for forwarding.
  • the leaf access device If the leaf access device does not have a pseudowire PW path backup policy, but the leaf access device and the client support OAM detection, the leaf access device notifies the client of the pseudowire connection path failure through the OAM packet. Select the backup forwarding path or stop the traffic;
  • the leaf access device If the leaf access device does not have a pseudowire PW path backup policy, and the EFM or CFM link detection protocol is not supported between the leaf access device and the client, the leaf access device converts the pseudowire connection path fault into a port fault. After the client knows that the port is faulty, reselect the backup forwarding path or stop the traffic.
  • the primary access device is further configured to notify the server of the access side path failure recovery when the access side path between the server and the primary access device recovers, and to all the leaf connections to the point-to-multipoint service. The device is notified that the pseudowire connection path is faulty.
  • the server is configured to switch the server-to-client traffic back to the primary forwarding path for forwarding after the path fault recovery of the access side is performed;
  • the leaf access device or client is used to reselect the effective forwarding path and switch the client-to-server traffic back to the primary forwarding path for forwarding.
  • the method and system for the path switching based on the point-to-multipoint service provided by the present invention when the access side path between the server and the primary access device fails, the primary access device notifies the server that the access side path occurs. The fault and all the leaf access devices are notified that the pseudowire connection path is faulty; the server switches the server-to-client traffic to the backup forwarding path for forwarding through the backup access device; the leaf access device or the client reselects the effective forwarding path. Switch client-to-server traffic to the backup forwarding path for forwarding.
  • FIG. 1 is a topology diagram of a prior art point-to-point service network structure
  • FIG. 2 is a topology diagram of a prior art point-to-multipoint service network structure
  • FIG. 3 is a topology diagram of a point-to-multipoint service network structure according to an embodiment of the present invention.
  • FIG. 4 is a flowchart of a path switching method based on a point-to-multipoint service according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a path switching system based on a point-to-multipoint service according to an embodiment of the present invention.
  • the basic idea of the present invention is: When the access side path between the server and the primary access device fails, the primary access device notifies the server that the access side path fails and notifies all leaf access devices of the pseudowire connection. The path is faulty.
  • the server switches the server-to-client traffic to the backup forwarding path through the backup access device.
  • the leaf access device or client reselects the effective forwarding path and switches the client-to-server traffic to the backup forwarding path. Forward.
  • the point-to-multipoint service is an ETREE (Ethernet Tree) service.
  • the scenario is a typical SC network model.
  • the client establishes communication with the server through the L2VPN network.
  • the root PE device includes the PE and the PE.
  • the PE is the primary access device and the PE is the backup.
  • the device is connected to the device.
  • the leaf PE device includes PE1, PE2, and PE3, and connects to client 1, client 2, and client 3.
  • the present invention firstly performs the deployment of the ETREE service, and specifically includes: establishing a point-to-multipoint service pseudowire connection between the root PE device and the leaf PE device, that is, the PE and PE1, PE2, and PE3 respectively establish points through PW1, PW2, and PW3.
  • Multi-point service pseudowire connection, and PE, and PE1, PE2, and PE3 respectively establish PX1, PW2, and PW3 to establish point-to-multipoint service pseudowire virtual connection; leaf PE devices respectively configure pseudowire PW path backup strategy, PW1, PW2, and PW3 are used as the backup forwarding path of PW1, PW2, and PW3.
  • the relationship between the active and standby forwarding paths between the client and the server is established.
  • the forwarding path is forwarded to ensure the normal communication of the service.
  • the service pseudowire is configured as the local non-interworking mode. That is, the root PE device and the leaf PE device communicate with each other. The leaf PE devices do not communicate with each other. The information between the clients is mutually shielded. At this point, the traffic between the root PE device and the leaf PE device is bidirectional, and the traffic between the leaf PE devices is unreachable, forming an ETREE service model.
  • the OAM detection of the access side path between the server and the root PE device is performed; specifically, the server and the root PE device respectively deploy EFM (Ethernet in the First Mile) or connection fault management ( Link detection protocol such as CFM, Connectivity Fault Management;
  • EFM Error Network in the First Mile
  • connection fault management Link detection protocol such as CFM, Connectivity Fault Management
  • the server and the root PE device respectively enable OAM packet sending and receiving.
  • the server and the root PE device can send and receive OAM packets to each other, detect the path fault on the access side between the server and the root PE device, and support fault notification.
  • the OAM detection is performed on the pseudowire connection path between the root PE device and the leaf PE device.
  • the root PE device and the leaf PE device respectively deploy TMPLS OAM or Bidirectional Forwarding Detection (BFD).
  • the path detection protocol is enabled.
  • the root PE device and the leaf PE device respectively enable OAM packet sending and receiving.
  • the root PE device and the leaf The PEs can send and receive 0 AM packets to each other to detect path faults between the root PEs and the leaf PEs in real time, and support fault notifications.
  • the point-to-multipoint service-based path switching method provided by the present invention includes the following steps:
  • Step 401 When the access side path fails, the primary access device notifies the server that the access side path is faulty, and the server switches the server-to-client traffic to the backup forwarding path for forwarding.
  • the server and the client communicate through the primary forwarding path, as shown by the solid line in FIG. 3; when the access side path (AC) between the server and the primary access device PE occurs
  • the PE sends an OAM packet to the server through the link detection protocol, such as EFM or CFM, to notify the access side that the path is faulty.
  • the server learns that the path on the access side is faulty, the server will be faulty.
  • the traffic to the client is switched to the backup forwarding path for forwarding. That is, the traffic is forwarded through the backup forwarding path AC'.
  • the traffic reaches the PE', it is forwarded to the client 1 through the backup forwarding paths PW1', PW2', and PW3' respectively. End 2, client 3.
  • the traffic from the server to the client is forwarded along the backup forwarding path shown by the dotted line in Figure 3. However, the traffic from the client to the server still occupies the real path and is forwarded. Normally notify the server.
  • the server and the PE are connected by real ports, and use Virtual Local Area Network (VLAN) to differentiate service traffic.
  • VLAN Virtual Local Area Network
  • the point-to-multipoint service is used.
  • the service access side is considered to be faulty.
  • Step 402 The primary access device notifies all leaf access devices under the point-to-multipoint service that the pseudowire connection path fails.
  • the PE deletes the corresponding path forwarding table, and the forwarding path of the deleted path forwarding table is: AC ⁇ PW1/PW2/PW3;
  • the PE sends a CSF (Client Service Fail) message to all leaf PEs in the service, that is, PE1, PE2, and PE3, to advertise the corresponding pseudowire connection path. malfunction.
  • CSF Client Service Fail
  • Step 403 The leaf access device recalculates the effective forwarding path through the pre-configured pseudowire PW path backup policy, and switches the client-to-server traffic to the backup forwarding path for forwarding.
  • the leaf PE device is the PE1.
  • the PE1 learns that the PW1 pseudowire connection path is faulty and enters the signal failure (SF, Signal Fail) state.
  • the pre-configured pseudowire PW is obtained.
  • the path backup policy obtains the backup forwarding path PW1' of PW1, and resets the path forwarding table.
  • the forwarding path of the reset path forwarding table is: PW1' ⁇ AC' 0 to this, the client-to-server traffic is along the dotted line of Figure 3.
  • the backup forwarding path shown is forwarded.
  • the backup and forwarding path processing process of the PE2 and the PE3 is the same as that of the PE1, and is not described here.
  • the PE when the path of the access side between the server and the PE is restored, after the PE detects the fault recovery, the PE may also switch back to the primary forwarding path for forwarding, and finally, the server and the client.
  • the two-way traffic is restored to the primary forwarding path.
  • the specific process includes: The PE advertises the access-side path fault recovery to the server, and the server switches the server-to-client traffic back to the primary forwarding path for forwarding; the PE goes to the point-to-multipoint service.
  • the leaf PE device advertises the pseudowire connection path failure recovery; the leaf device PE recalculates the effective forwarding path through the pre-configured pseudowire PW path backup policy, and switches the client-to-server traffic back to the primary forwarding path for forwarding.
  • the leaf PE device pre-configures the pseudowire PW path backup policy
  • the server-to-client traffic is switched to the backup path through the server, and then the client-to-server traffic is switched to the backup through the leaf PE device.
  • the path is forwarded, the fault convergence speed is accelerated, and the bidirectional traffic is quickly switched to ensure normal communication of the SC model.
  • step 403 if the leaf PE device is not configured with a pseudowire PW path backup policy Slightly, but the leaf PE device and the client support the link detection protocol such as EFM or CFM, the leaf PE device advertises the pseudowire connection path fault to the client through OAM ⁇ , and the client selects the backup forwarding path or stops. Traffic, at this time, the client-to-server traffic forwarding path is determined by the client; if the leaf PE device does not have a pseudowire PW path backup policy, and the leaf PE device and the client do not support link detection protocols such as EFM or CFM Then, the leaf PE device converts the pseudowire connection path fault into a port fault. After the client knows that the port is faulty, the client reselects the backup forwarding path or stops the traffic. At this time, the client-to-server traffic forwarding path is determined by the client.
  • the present invention further provides a path switching system based on point-to-multipoint service.
  • the system includes: a primary access device, a server, one or more leaf access devices, and a leaf The client corresponding to the access device;
  • the primary access device is configured to notify the server that the access side path fails when the access side path between the server and the primary access device fails, and notify all leaf access devices under the point-to-multipoint service The pseudowire connection path has failed;
  • the server is configured to switch the server-to-client traffic to the backup forwarding path for forwarding after the access path fails.
  • the leaf access device or client is used to reselect the effective forwarding path and switch the client-to-server traffic to the backup forwarding path for forwarding.
  • the primary access device includes: an AC side OAM detection module, a service management module, a PW side OAM detection module, and a service forwarding module;
  • the AC-side OAM detection module is configured to detect an access-side path fault, and implement the OAM packet transmission and reception with the server through the protocol;
  • the protocol may be a link detection protocol such as EFM or CFM;
  • a service management module configured to maintain a correspondence between the access side path and the pseudowire connection path in the point-to-multipoint service
  • the PW side OAM detection module is configured to detect a pseudowire connection path fault and implement the protocol.
  • the OAM packet is sent and received between all the leaf access devices in the point-to-multipoint service;
  • the protocol may be a link detection protocol such as TMPLS OAM or BFD;
  • the service forwarding module is configured to maintain the forwarding path information, and forward the traffic according to the path information in the service forwarding table in the service forwarding module.
  • the service management module further includes: a virtual AC management module and a virtual PW management module; wherein, the virtual AC management module is configured to maintain an access side path state under the point-to-multipoint service; and includes one or more AC management modules.
  • Each of the AC management modules is configured to maintain the path status of each access side. For the point-to-multipoint service, multiple access side paths may exist. When all the access side paths of the service fail. The virtual AC management module considers that the access side path of the service is faulty. When the virtual AC management module considers that the access side path of the point-to-multipoint service fails, the fault is notified to all PW management modules of the service.
  • the virtual PW management module is configured to maintain a pseudowire connection path state under the point-to-multipoint service; and includes one or more PW management modules, where each PW management module is used to maintain the status of each pseudowire connection path.
  • the leaf access device includes a PW path backup module, configured to configure a pseudowire PW path backup policy, and provide a backup forwarding path for forwarding traffic.
  • the leaf access device or the client switches the client-to-server traffic to the backup forwarding path for forwarding, including:
  • the leaf access device If the leaf access device is configured with the PW path backup policy, the leaf access device recalculates the effective forwarding path through the pre-configured pseudowire PW path backup policy, and switches the client-to-server traffic to the backup forwarding path for forwarding.
  • the leaf access device If the leaf access device does not have a pseudowire PW path backup policy, but the leaf access device and the client support OAM detection, the leaf access device notifies the client of the pseudowire connection path failure through the OAM packet. Select the backup forwarding path or stop the traffic;
  • the leaf access device If the leaf access device does not have a pseudowire PW path backup policy, and the leaf access device and the client If the link detection protocol such as EFM or CFM is not supported between the two ends, the leaf access device converts the pseudowire connection path fault into a port fault. After the client knows the fault of the port, the client reselects the backup forwarding path or stops the traffic.
  • the link detection protocol such as EFM or CFM
  • the primary access device is further configured to notify the server of the access side path failure recovery when the access side path between the server and the primary access device recovers, and to all the leaf connections to the point-to-multipoint service. The device is notified that the pseudowire connection path is faulty.
  • the server is configured to switch the server-to-client traffic back to the primary forwarding path for forwarding after the path fault recovery of the access side is performed;
  • the leaf access device or client is used to reselect the effective forwarding path and switch the client-to-server traffic back to the primary forwarding path for forwarding.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

La présente invention porte sur un procédé et un système de commutation d'un chemin sur la base d'un service point à multipoint. Le procédé comprend les opérations suivantes : lorsqu'un chemin côté accès entre un serveur et un dispositif d'accès maître subit une défaillance, le dispositif d'accès maître notifie la défaillance dans le chemin côté accès au serveur, et notifie la défaillance dans le chemin de connexion de pseudo-circuit à tous les dispositifs d'accès feuille; le serveur commute le trafic, qui va du serveur aux clients, vers un chemin d'acheminement de secours, en vue d'un acheminement par l'intermédiaire d'un dispositif d'accès de secours; les dispositifs d'accès feuille ou les clients resélectionnent des chemins d'acheminement valides, et commutent le trafic, qui va des clients au serveur, vers le chemin d'acheminement de secours, en vue d'un acheminement. Selon la solution décrite par la présente invention, lorsque le côté accès du service point à multipoint subit une défaillance, la défaillance peut être délivrée au dispositif de nœud feuille par le mécanisme de notification de défaillance d'exploitation, d'administration et de maintenance (OAM), et le trafic peut être sélectionné rapidement par la technologie de protection par redondance de pseudo-circuit (PW), permettant ainsi de réaliser la commutation rapide du trafic bidirectionnel, d'améliorer la capacité de convergence de défaillance, et d'assurer la stabilité du réseau.
PCT/CN2011/074603 2010-08-23 2011-05-24 {0> procédé et système de commutation de chemin sur la base d'un service point à multipoint <}0{><0} WO2012024952A1 (fr)

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CN101924654B (zh) * 2010-08-23 2015-04-01 中兴通讯股份有限公司 一种基于点到多点业务的路径切换方法及系统
CN102098231B (zh) 2011-03-18 2013-09-11 杭州华三通信技术有限公司 在h-vpls中实现流量快速切换的方法及设备
CN102694718B (zh) * 2011-03-25 2016-03-30 华为技术有限公司 一种vpls快速重路由方法和设备
CN102325042A (zh) * 2011-07-19 2012-01-18 中兴通讯股份有限公司 Pe及同源同宿pw的保护方法
CN102833774B (zh) * 2012-08-29 2015-12-09 华为技术有限公司 一种ip无线接入网系统及其主用伪线故障的处理方法
CN104253745B (zh) * 2013-06-29 2018-05-29 华为技术有限公司 一种路由撤销方法和网络设备
CN106330700A (zh) * 2015-06-15 2017-01-11 中兴通讯股份有限公司 数据通讯网络主备接入网元保护的方法及装置
CN107547369B (zh) * 2017-08-14 2019-12-06 新华三技术有限公司 流量切换方法及装置
CN109428865B (zh) * 2017-08-30 2021-12-07 中兴通讯股份有限公司 一种切换标签交换路径更新权限的方法及相关设备
CN113037622B (zh) * 2019-12-24 2024-01-05 华为数字技术（苏州）有限公司 一种防止bfd震荡的系统及方法
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CN115514695A (zh) * 2022-09-16 2022-12-23 奥特酷智能科技(南京)有限公司 一种车载以太网拥塞自适应数据转发方法及系统

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